Safety-tube.



SAFETY TUBE.

APPLICATION FILED JUNE 10, 1912. RENEWED 00T. 27, 1913.

Patented May 19, 1914.

3l/@Minnow COLUMBIA FLANOURAPM CO..WASHINOTON. mc.

JOHN H. JONES, 0F OAKLAND CITY, INDIAA.

SAFETY-TUBE.

Specification of Letters Patent.

Patented May 19, 1914-.

Application iiled June`10, 1912, Serial No. 702,738. Renewed October 27, 1913. Serial No. 797,651.

To all whom it may concern Be it known that I, JOHN H. JONES, a citi- Zen of the United States of America, residing at Oakland City, in the county of Gibson and State of Indiana, have invented certain new and useful Improvements in Safety-Tubes, of which the following is a specification.

This invention relates to safety tubes for the use of miners, the object of the invention being to provide an improved device of this character adapted to be quickly and readily attached to the standard packages in which blasting powder is ordinarily supplied to the trade, together with means for controlling the passage of the powder through said tube, said means being constructed in such manner as to render the device safe and prevent wasting of the powder. This safety tube when attached to a powder can renders the handling of said can perfectly safe even in the presence of iire, and prevents damage to the powder by water when it is necessary to handle the can in wet or damp places.

Further objects and advantages of the invention will be set forth in the detailed description which now follows.

In the accompanying drawing Figure 1 is a side elevation of a safety tube constructed in accordance with the invention. Fig. 2 is a sectional view therethrough, and Fig. 3 is a sectional view through a portion of said tube, said view being taken at right angles to the section shown in Fig. 2.

Like numerals designate corresponding parts in all of the figures of the drawing.

A. cylindrical tubular member comprising an upper portion 5 and a lower portion 6 rigidly attached thereto and made in one piece therewith, has extending from one side thereof at an obtuse angle, a connecting tube 7. This tube is externally threaded at 8 for the reception of a locking nut 9, said locking nut being provided at its outer portion with an inturned flange 10. Secured to the inner wall 7 by rivets or like fastenn ing devices 11, are latches 12, having fiat springs 13 bearing against their outer faces, said springs normally tending to force the transverse head portions 14 of said latch bars outwardly. These heads are provided with cam faces 15, and when it is desired to secure the entire structure to the powder can 16, the device is forced into the position illustrated in Fig. 3, at which time the cam faces 15 ride over the inner edge wall of the usual neck extension 17 of the powder can and snap into engagement beneath the end wall of said powder can, as is illustrated in Fig. 3. After this hasbeen done, the nut 9 is turned to cause the flange 10 to bear against the neck extension 17 of the powder can. It will be noted that the upper portion 5 of the cylindrical member is somewhat larger in diameter than the lower portion 6, and disposed within the upper portion 5 is a tubular valve member 18, the interior of which lies flush with the interior of the lower portion 6. The valve member 1S is cut away at 19 so that when the valve member is turned this cut away portion is brought into alinement with 'the open end of connecting tube 7 An angular shank 20 projects outwardly through a cap 21 that is threaded upon the t-ubular member, and said shank carries an operating piece 22 having lwing extensions 23 to permit of the r ready engagement of said piece by the iingers. A screw 24C passes through the upper portion 5 and its inner end is disposed in a slot 25 formed in the tubular valve 18, whereby the turning movement of this valve is limited. A cap 27 is threaded into the lower end of the portion 6.

From the foregoing description it will be seen that the parts carried by the connecting tube 7 provide ready means for attaching the device to a powder can. Furthermore, disposing this connecting tube at an obtuse angle to the main body portion formed by the upper and lower portions 5 and 6 brings this main body portion into a most convenient position for discharging the powder therefrom. The vtubular valveV provides ready means for cutting o communication between the interior of the safety tube and the interior of the powder can and the cap 27 provides a further safeguard against the entrance of either fire or water to the interior of the powder can.

This device not only safeguards the life of the user, but it provides an ehcient means from when the cap is removed. Further, the turning of the valve to thus cut oif co1nmunication between the interior of the body portion and the interior of the powder can eifectually guards against the entrance of a spark of fire to the interior of the can during the time that the powder is being discharged from the safety tube.

Vhile the elements shown and described are well adapted to serve the purposes for which they are intended, it is to be understood that the invention is not limited to the precise construction set forth but includes within its purview such changes as maybe made within the scope of the appended claims.

Having described my invention, what I claim is l. In a safety tube of the character described, the combination with a tubular body portion, of a tubular valve located therein,

means for controlling said valve from the exterior of thetubular body portion, a closure for the end of said tubular body portion, a transverse extension carried by the tubular body portion and means carried by said extension and adapted for engagement with a powder can to thereby secure the device in position to dispense the contents of said can.

2. In a device of the character described,

the combination with a tubular body portion,

operable member located upon the end of said tubular body portion and upon the eX- lterior thereof, a connection between said manually operable member and said valve, a tubular extension carried by said tubular body portion, said valve controlling communication between said tubular extension and the interior of the tubular body portion and means for engaging said tubular eXtensio-n with a powder can.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. JONES.

Witnesses:

HARLEN L. KAYS, JOHN BRYANT.

Copies of this patent may 'be obtained for ve cents each, by addressing the Commissioner of Patents,

. Washington, ID. C. 

